LG KP175 - Page 43

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4. TROUBLE SHOOTING
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CheckC500,C502,C503
Check whether Ant SW
Set as RX mode
Refer to Table 4.2.2
Yes
Check SW500 Pin ANT,RF
with RF Cable connected.
Open
Yes
Changing SW
500
Check SW500 Pin ANT,RF
with No RF Cable Connected
Short
Yes
Changing SW
500
For these 2 test case,
No Call connection is needed
No
No
Changing the Board.
Check RF Level of
U501.7(for GSM)
& U501.6 (f
or DCS)
Ant SW & Mobile SW is OK
See next Page to check
Rx I/Q Signal
Pin 7 : ~ -62dBm
Pin 6 : ~ -63dBm
No
Changing U
501
Yes
No
For this RF Level test case,
RX Stand alone Mode is needed
refer to chapter
10
Check ANT SW & Vdd
011GSM Tx
BSTx_EN
111DCS Tx
101DCS Rx
001GSM Rx
Input Control Bits
VlogicMode
CHECKING FLOW